Burglarproof lock



April 18, 1933. w PRIOR, JR 1,904,881

BURGLARPROOF LOCK Filed April 20 1929 INVENTOR ifhZier Prior x275 umreof ems PArENroFi-I B Y Patented Apr.,18, 19 33 1 I WALTER PRIOR, sontrn'oimnen; new JERSEY, AssIeNon-,'mr 1nmr:orn1vn mnsnn Assie vMENTs, or; ONE-HALE pro AUGUST F. VIEHWEGER, 0F roUGHKEEPs'IE, NEW YORK, Ann own- AL 'rofnnnRY '13. MORGAN;..OF"1AME1YIA,"NEW 'ronx alnnernnrnoor Loon Am an;jmeag giiao,

' present invention relates to an improve;

' ment1ili-l0cks fand, while n'otjso limited; itj is specifically directed to burglarproofi-locksof aknown-type and for-its main object the provision of means thereon whereby to add to the protective means insuchjlocks.

lock the lock proper is usuallymouiitedon the inside of a door with itscooperating striker, anolis controlledby the usual knobs for inside manipulation. Suchtypeoflock is ,usuallyjprovided with an exteriorly mounted key operated pin .tumblerfmechanism 013,153.-

miliar barrel type, such mechanisnrbeing so mounted upon the exterior faceof the door in order'tozpermitof easyzaccess to throwlthe bolts by suchikeylt from outside.of thedoor.

In such ,installation' the. door is usually bored to fit the pin 1 tumbler mechanism and to pass the boltoperating lever therefrom to its operative, connection with the interiorly. mon t d 100k} I.

' In attempts to-lfofce u trud'er very often wrenches or priesthe pin tumbler mechanism from itsgseat and thuszez'e.

poses the inner face of the lock and itsappurtenant throw mechanism to the useof a screw immediately looking the protective means in .its protecting position when caused to function so that saidprotecting means is', ofit-self,

or destruction; 1

driyer which may be introducedg into the opening thus exposed and-the throw mechanism thrown back; moving the bgol'ts and permitting of easy access to the room. r

. To" overcome this failingfand to -prevent easy access to sucha-lockor, in somerrespects,'

togdelay easy entry by the a-bove'inentioned methods, I have provided-the lock' p'roper with means herinafter outlined; to: automatically interpose aninterit'erence tosuch easy in lock operation without in, any Way, obstructing the regular and normal function, ofthe proper action of the undisturbed lock," such when the lock is undisturbed; but becoming instantly operative as a protective means when the pin tumblercylinder isremoved; i I

A further object is to providemeans "f0 protected against manipulation and removal H r I spirit of the "invention In the customary installation of this typeof jends fmay be accomplished.

Modifications may be made irithestructiire of my devicewithout departing from th'e 'th f w e he 9- pended:1cla inis{ffl f A 1 In the'a'c oinpanyingdrawing;

. Fig. l is a rear view, of. a lockjshowing-ithe conventional ba'ck plate thereon "with" my ole -yice in operatiye lock protectingposition;

., Fig. 2' is a sectionaltfaken on the line 2+2, Fig; 1, showing characteristic construe 'tional features ofsucha lockbut emphasiz I i ention more infde one position in, 1oek,.j;, L a Fig. 4 is ayi'ewp similar to Fig. 1, showpositionin. a lock n tmu pnndisturbea; v

Fig. 5' is a plan a'rievlvf; showing 'the coacting partsof'the locklin'};operatiyeassembly. y In illustratingfthe*lockherein only, such details fof the Well known type .oflock-are '1 I shown. asEcioOprate with 'my device, a-ndit c is thought thatsuch lock needs noelaborate description} to define itsfunctions "mans, cop r i n thmnP C ive vi e-,1] x

,mg. a is a'pe speetikv etv 6f the patte .tlve bafiiefmember removed from itsopera- .70 ing theba'ifieinember in; set,.ready to operate,

prises asurrounding casing 1;-usua 11 be cast orstruckup metal; the rearof which is' open controls thefbolts to operate thesanie; i

,topermit of assemblyofthe-operative bolt The front of the lock; & isprovided with a .manuallyfoperable knob .5' whereby, in the usual fashion, thebolt's 3 maybe inanually V moved. from the inside of the door 25,, to protective meansbeing normally inoperative,

which it may be applied.

p 7 rotatably mounted therein, "which bushing also carries. means :tooperate to throw the Fig. 4,;through which ifsj pa'ssed a fiatactua;

- tor' or bar; 9, shownsectioned saidfigurey j The-back or cover plate: 6, i 1

against the inside facel ofna idoor s wheii the lockyis applied, mounts a the usual bushing a in its operative position. Said bar is an extension from the rotatable barrel of a cylindrical pin tumbler casing 22. The usual key is inserted in a key rim 23 of an escutcheon 24, on the outer side of the door '25, to

rotate the actuator 9 and therefore the bushing 7 to throw the bolts 3.

member 12which coordinates with the wall v 18 of'the lock casing 1. Thus, as shown in Fig. 4, the. thin baffle plate, best shown in its details in Fig. 3, has one face 14 constantly pressing upon the transversely mounted cylinder throw bar '9 and is thus held throughout the normal, undisturbed functioning of the lock.

Should the cooperating key cylinder be torn or removed from its operative position in a door, 1ts removal would carry with it the bar 9 which. is normally attached to said cylinder, and the withdrawal of the bar 9 would, consequently,removethesupporttothe prising a casing, a recessed rear plate, bolt spring tensioned baffle 10 and thus cause the baflie to be thrown over to the position shown in Fig. 1, where it is stopped by. thestop face 15 thereof formed by flattening the battle,

as shown, and its cooperation with'the indented wall 16 which surrounds the baffle plate and, with the floor 17, forms an operative recess or chamber in the back plate 6 to provide operative space for thefree operation of my device. This space is best shown in'Fig. 2, at 18, where the bushing 7 is partly disposed in the recess, there being an opening in the floor or wall 17 for said bushing, as shown. I v

The bafiie plate is, preferably, made of a hardened steel to resist drilling when it is stopped in the covering position as shown in Fig.1.

I To prevent its being forced back to expose the slot 8 in the bushing 7, the baffle is provided with aback stop 19, Figs. 1, 2 and l, which is formed by beingpunched up out of the floor17 of the back plate. This stop has 7 a rounded face at the rear thereof to permit of the riding thereover by the bafiie member when closing the slot 8, but it has a squared ,frontface 20 whereby to act as a stop ledge when the baffle has fallen to protective posi ftion as shownin Fig. 1.

Thenormal inoperative relative positions of the baflle and back stop are fully shown in Fig. 4, and by the dotted. position of the baflie, Fig.2, at A.

Thus, it will be noted that I have provided a burglar or jimmy-proof lock with means to protect it against unauthorized opening In'Fig; the bar 9,;when innormally operative position,- as shown, in its extension.

traction of said 'baflie plate.

end loosely bearing on the walls of said casing whereby when said actuator is removed said resilient member will cause the baffle plate to cover said bushing and a stop pin in said recess for preventing the'retraction of said baflie plate.v I I 2. A lock of the character described, comprising a recessed rear plate, bolt operating mechanism disposed within said recessed rear plate, a baffle plate pivotally leaning on said bolt operating mechanism whereby when saidbolt operating mechanism is removed said baffle plate will pivot downwardly and cover said bolt operating mechanism, and'a stop pin in said recess for preventing the re- 3. A lock of .the character described, comoperating mechanism disposed within the recess'of said plate, baffle means .pivotally leaning on said bolt operating mechanism, a resilient member affixed by one ofits ends to saidbafile means. and its otherend loosely bearing on the walls of said casing whereby when said bolt operating mechanism is removed said resilient member will cause said baflle means to fall down and-baffle or protect said bolt operating mechanism, and meansin. I said recess'for preventing the retraction of said bafiie means.

4:. In a lock of the character described a casing, a bolt operating mechanism having a thereon a part which is outwardly positioned with relation to said casing, a part which is inwardly positioned with relation to said casing and an inward extension of said first mentioned part. a shiled member movably connected to said casing and norm ally held in anon-shielding position by said extension,

whereby when said first mentioned part and said extension are surreptitiously removed, said member is automatically interposed to shield and prevent access to the said last mentioned part and a stop on said casing for cessed plate, a bushing movably cooperating with said bolt and having a slot in said recess, a bolt actuator disposed in said slot, a shield flo ly engaging said actuator, a singlespring'dis-. I

posed between the wall of said-casing and a said shield to urge the latter for covering said I slot on-surreptitious-removalof said actuator, j 1 I r and a stop on the wall of said recess ltohold I recess and normally engaging said actuator, V 4 a movably mounted in said recess and normalsaid shield in the covering position.

' 6. A look comprising incombinationa cas-- 1 a 7 ing having a bolt therein and including a re? a cessed plate, bushingmovably cooperating v with said bolt and having a slotin saidfre-i cess, a destructible boltactuator disposed in l 1 V ,i

said slot, a shield movablymounted in said said shield having thereon a stop face, a sin-- gle-springdisposed between the .wall of said casing and 'saidshield to urge the latter for I I covering said slot on destruction of said actu-' 1' ator, and astop formed by the wall of said recess; to 000, eratewith said face' for hold-f finggsaidshie d in the coveringpositionr;

f7. A=lock comprising in combination, a

' casing having a bolt therein andaincluding a a recessed plate, a pivot carried by the wall of said recess, a bushing movably' cooperating with said bolt and having a slotflin said recess,

: a destructible bolt actuator disposed in said 1 slot, a shield movably mountedin said recess and normally engaging said actuator, said I a shield having thereon aistop face,l .a single,

springdisposed between the wall-of said-cas-- ing and said shield to urge the latter for co'vering said slot ondestruction of said:;actuator, anda stop formed by the wall of saidrecess. to cooperatevwithsaid-face for holdingj said shield inthe covering position.

8. A lock comprising in combination a case a ing having a bolt therein andincluding a reeessed-plate, said recess having a vertical wall and a base boundarywall', which latter 1 is provided withan opening, apivotlcarried t by said base wall,1abushing movablycooperating with saidbolt and havinga slotfin said recess, said bushing being disposedin said opening, a bolt actuator disposed in said slot, a shield movably mounted on said pivot and normally engaging said actuator,fa leaf I county 7 springhaving one of its ends movably seat-j ed on the innerperipheryof ,said'casing and having its other end rigid with said shield,

to urgethe latter for coveringsaid slot onsurreptitious removal of said actuator, and-a stop on said base wall'to hold said'shield in a the covering position'whereby' to prevent ac i tuation ofsaidbolt'. I Signed at 121 Sussex Ave., Newark, in the e 1 p of Essex and State of New Jersey, this 4th day of April,A .iDr 1929.}? 5}} f i V I WALTER PRIOR, "JR. 5 

